ANALOGUE

ANALOGUE (ἀνάλογος,
proportionate).—That which corresponds with another, resembling in
nature, structure, or function.

"By an Analogue is meant an organ
in one animal having the same function as a different organ in a different
animal. The difference between Homologue and Analogue may be illustrated by the
wing of a bird and that of a butterfly: as the two totally differ in anatomical
structure, they cannot be said to be homologous, but they are analogous in
function, since they both serve for flight" (M'Cosh, Typical Forms, p. 25).

In Logic a term is analogous whose single signification applies with equal
propriety to more than one object—as the leg of the table, the leg of the animal
(Whately, Logic, bk. III. sec. 10).